SIGMA HDPE meter box with a blue lid marked WATER and a reader opening

The photos show a selection of the range, with a blue lid; price-list lids are black, gray or purple. The item number sets the box, wall, colors and size.

Item # RMB111812NSW-W Questions and answers (9)

HDPE Meter Boxes

Rectangular HDPE meter boxes, 9 x 16 to 17 x 30 in., plus an oval box and extensions. Pick the box, the wall, the colors and the size. Lids are separate items.

Priced by request

Add it to your quote list or call 800.999.2550.

Non-stacking, stackable, flared and oval; standard or solid wall
Load rating depends on the box and lid combination
See all specifications

Box: Non-stacking

Wall and openings: Standard

Colors: Black, white inside

Size: 11 x 18 x 12 in.

Made: Domestic or import

BABA certifiable on request. For origin paperwork on your project, ask your regional team.

Material: HDPE

Polyethylene regrind and virgin resins, per the spec sheets.

Your distributor

SIGMA sells through waterworks distributors. Order with item # RMB111812NSW-W.

Quote from SIGMA

Job location

Sends your quote list to the right regional team.

Quantity

Download the spec sheets (all sizes)

Need help on the job?

Call 800.999.2550 with the size, style and colors you need.

Meter box lids Spec sheets by size

Everything about this 11 x 18 x 12 in. item.

Details, specs, every size and the questions buyers ask. Open what you need.

Product detailsWhat it is, highlights and documents

About HDPE meter boxes

SIGMA's HDPE meter boxes are rectangular, from 9 x 16 to 17 x 30 in., with an oval 10 x 17 in. box and extensions to add depth. They come non-stacking, stackable or flared, with a standard or solid wall, with or without mouseholes, in black, gray or purple, most with a white interior option.

Per the spec sheets, when buried, the walls will support an incidental traffic load with an appropriate traffic-rated lid, and the load rating depends on the box and lid combination. Lids are separate items, on the Lids page.

Highlights

Non-stacking, stackable, flared and oval
Standard or solid wall; extensions to add depth

Documents

SpecificationsNon-stacking, 11 x 18 x 12 in.

Non-stacking, 11 x 18 x 12 in.

Item number	RMB111812NSW-W
Box	Non-stacking, Standard (Black, white inside)
Size	11 x 18 x 12 in.
Made	Domestic or import
Material	HDPE
Load rating	Depends on the box and lid combination: ask your regional team
Max. deflection
Weight (price list)	10 lb
Pallet quantity
Spec sheet	RMB1118NSW
Price list	HDPE Rectangular Boxes, Lids and Extensions, effective 4/27/26

Materials and build

Standard wall	On the 11 standard non-stacking spec sheets and three of the four stackable spec sheets: 1/2 in. thick, three layers with a foam insulation core. The 11 x 18 in. stackable spec sheet shows a 1/2 in. solid wall. The oval box spec sheet shows a 1/2 in. laminated wall
Solid wall	On the solid wall spec sheets: a 1/2 in. solid wall (HD in the item number)
Interior	Smooth, with bright white optional, per the spec sheets
Pipe entry	On the spec sheets: two pre-formed pipe entry areas, one at the center of each short end. Mouseholes come on the items listed with them
Installation	Bedding and backfill, compaction, stacking and extensions: see the installation guide under Documents
Base	On the rectangular box spec sheets: an integral flat settling plate around the base

Rating and use

Box	Per the spec sheets, when buried, the walls will support an incidental traffic load with an appropriate traffic-rated lid. The flared boxes and extensions have no spec sheet
Lids	Separate items, in six sizes named like the boxes. Ask your regional team to confirm the lid for your box

Weights and dimensions

Weights	As printed on the price list. They can differ between colors of the same size
Dimensions	In each spec sheet (for most non-stacking, solid wall and stackable sizes, under Documents). The last number of the size matches the D dimension on the spec sheets

From the HDPE price list (effective 4/27/26), the box spec sheets (November 2026) and the installation guide (October 2026).

Every size and item number17 sizes · item numbers

The sizes that come with the box, wall and colors picked above. Pick a size to load it.

HDPE meter boxes: item numbers and weights by size
Size	Item #	Weight
	RMB91612NSW-W	8 lb
	RMB102012NSW-W	15 lb
	RMB111812NSW-W	10 lb
	RMB111814NSW-W	12.5 lb
	RMB111818NSW-W	15 lb
	RMB122012NSW-W	14 lb
	RMB132412NSW-W	15 lb
	RMB132418NSW-W	18 lb
	RMB141612NSW-W	10 lb
	RMB142212NSW-W	14.5 lb
	RMB152712NSW-W	14 lb
	RMB152714NSW-W	20 lb
	RMB152718NSW-W	21 lb
	RMB171814NSW-W	12 lb
	RMB173012NSW-W	23 lb
	RMB173018NSW-W	20 lb
	RMB173024NSW-W	38 lb

Item numbers and weights from the HDPE price list, effective 4/27/26. The last number of each size matches the D dimension on the spec sheets.

Questions and answers9 questions buyers ask about HDPE boxes

Where do I find the price?

The HDPE price list is not posted on this site. Add items to your quote list, ask your regional team, or call 800.999.2550 with the item numbers. SIGMA sells through waterworks distributors, and your distributor sets your price.

Is the lid included?

No. On the price list, boxes and lids are separate item numbers. The price list has lids in six sizes named like the boxes, on the Lids page; ask your regional team to confirm the lid for your box. The 9 x 16, 10 x 20, 12 x 20, 14 x 22 and 17 x 18 in. boxes and the oval box have no lid on the price list.

What load can the box take?

The spec sheets say that, when buried, the walls will support an incidental traffic load with an appropriate traffic-rated lid, and that the load rating depends on the box and lid combination. Each rectangular box spec sheet lists lid options with their ratings and says higher ratings are available on request. Ask your regional team for the rating of the box and lid you plan to use.

Standard or solid wall?

On the non-stacking spec sheets, the standard wall is 1/2 in. thick in three layers with a foam insulation core. Solid wall boxes (HD in the item number) have a 1/2 in. solid wall. The lid ratings listed for the two can differ, so ask your regional team about the size you need.

How do I stack boxes or add an extension?

The price list sells boxes as non-stacking, stackable or flared; the documents do not define the styles, so ask your regional team which suits the job. The installation guide says to measure from the base of the hole to grade at each end, stack the boxes higher than that, cut the base of the riser box to the right height or angle, and fasten them with two screws on each side (three on the 15 x 27 and 17 x 30 in. extensions). When cutting to grade, allow for the lid area, 1.75 in. deep.

Which boxes have a spec sheet?

Non-stacking boxes in 11 sizes, solid wall non-stacking boxes in 9 sizes, stackable boxes in 4 sizes and the oval box each have one, under Documents; the “Spec sheet” line under Specifications names the one for the item picked. The flared boxes, the extensions and a few sizes have none: ask your regional team for drawings.

What is a mousehole?

An opening at the bottom of the wall. Boxes with one carry M in the item number (W/MH on the price list); some 14 x 16 and 17 x 18 in. boxes come with three or four. The non-stacking spec sheets show two pre-formed pipe entry areas, one at the center of each short end.

Can I add depth?

Yes. The price list has 6 and 12 in. rectangular extensions for the 13 x 24, 15 x 27 and 17 x 30 in. boxes, and a 12 in. extension for the 11 x 18 in. box. It also lists a 20 x 20 x 12 in. full barrel extension: ask your regional team what it fits.

Can I get special markings or colors?

The boxes on the price list come black, gray or purple, most with a white interior option, and the lids black, gray or purple. For other colors, markings, a town's logo or other custom work, ask your regional team.